create table userInfo
(
customerID bigint identity(1,1) not null,
customerName char not null,
PID
)
go
我想把PID的约束为‘18位和15位’直接写在PID后面,应该怎么写呢?
create table userInfo
(
customerID bigint identity(1,1) not null,
customerName char not null,
PID
)
go
我想把PID的约束为‘18位和15位’直接写在PID后面,应该怎么写呢?